Adjusting Powervalves

[Steve C]

I have a couple of the older cast Lamey non power valve cylinders & love em. Want to build a new power valve moter for a SXR, maybe a Superjet. I do not know anything about the power valves, how hard are they to adjust, how do you know where they should be set? Team scream has low profile that I think you change the springs? thanks, Steve C.

 

[wsuwrhr]

They are adjusted largely to the total setup and rider preference. More tension slows their opening and less tension speeds it up, as simple as that.

Brian

I have a couple of the older cast Lamey non power valve cylinders & love em. Want to build a new power valve moter for a SXR, maybe a Superjet. I do not know anything about the power valves, how hard are they to adjust, how do you know where they should be set? Team scream has low profile that I think you change the springs? thanks, Steve C.

 

[Boris]

In a way it's like adjusting your pop off pressure by using a different spring.

 

[norcal ex]

yes but be careful... if screwed in to much is will make the ski run lean and heat up your pipe. you need to adjust the carbs accordingly.

 

[Steve C]

Ok Guys, so I guess to be conservative you would start out loose (I guess loose is very safe but if to loose defeats the purpose of having power valves) & slowly tighten while all at the same time trying to feel for better bottom & mid as well as watching that you do not get to lean or hot. Is that accurate? Thanks Guys, Steve C.

 

[SUPERJET-113]

i have a question to add to this thread if you dont mind.

Can a cast Lamey that does not have that "shelf" area where the PV's go have material welded on and machined to hold a PV?

 

[wsuwrhr]

Anything is possible, but I wouldn't do it if it were mine.

If you are looking for PV's I have a buyer for your cylinder, we could set you up with a billet PV cylinder if you like.

Brian

i have a question to add to this thread if you dont mind.

Can a cast Lamey that does not have that "shelf" area where the PV's go have material welded on and machined to hold a PV?